Based on research, stress which is chronic in nature is very likely to increase a person's chances of having heart diseases. However, if your reports are normal and you still feel like you are having a heart attack, it might indicate a panic attack. For proper diagnosis and treatment, you will need to consult a Clinical Psychologist.
Please be assured that panic attacks can be treated through therapy.
Next Steps
You should consult a Clinical Psychologist asap.
Health Tips
Start keeping a track of when it happens.
Don't delay in seeking support, your mental health is a priority.